About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Microstructural and Corrosion Behavior of Layered AA6061 Alloy Fabricated by Friction Stir Additive Manufacturing |
| Author(s) |
Tanaji Paul, Sohail Mohammed, Jorge Carreno Meneses, Katrina Rodriguez, Anil Lama, Tony Thomas, Sean Langan, Arvind Agarwal |
| On-Site Speaker (Planned) |
Tanaji Paul |
| Abstract Scope |
Friction Stir Additive Manufacturing (FSAM) offers a solid-state route for fabricating large scale, lightweight aluminum components with refined microstructures, yet its impact on corrosion resistance remains insufficiently understood. This study evaluates the microstructural evolution and corrosion behavior of AA6061 aluminum alloy fabricated by FSAM. Electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM) analyses revealed heterogeneous grain structures and elemental segregation at interlayer interfaces, including Fe-rich intermetallics and Mg₂Si precipitates. Compared to feedstock, FSAM samples exhibited higher corrosion rates (1.02 ± 0.03 vs. 0.74 mil per year), as determined by potentiodynamic polarization. Post-corrosion microscopy revealed pitting and intergranular corrosion concentrated at layer boundaries, driven by microstructural discontinuities and localized galvanic cells. These findings highlight the critical role of interfacial integrity and thermal history in governing corrosion susceptibility in layered aluminum builds, with implications for the structural reliability of FSAM components in corrosive environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |